CN1644927A

CN1644927A - Compressor

Info

Publication number: CN1644927A
Application number: CNA2005100518651A
Authority: CN
Inventors: 井口雅夫; 木村一哉; 清水出; 多罗尾晋; 川上晃广
Original assignee: Toyoda Automatic Loom Works Ltd
Current assignee: Toyota Industries Corp
Priority date: 2004-01-14
Filing date: 2005-01-13
Publication date: 2005-07-27
Anticipated expiration: 2025-01-13
Also published as: EP1555437A1; KR100722733B1; JP2005201114A; EP1555437B1; CN100363625C; US20050169787A1; DE602005000066D1; KR20050074891A; DE602005000066T2

Abstract

A compressor has a housing, a compression mechanism and a partition member. The housing defines therein a discharge chamber. The compression mechanism is located adjacent to the discharge chamber in the housing. The partition member faces a predetermined region, which is a portion of the compression mechanism that faces the discharge chamber except a specific region where a gas discharge port opens, for restraining pressure of refrigerant gas in the discharge chamber to be applied to the predetermined region.

Description

Compressor

Technical field

The present invention relates to a kind of compressor, for example the compressor of motorcar air conditioner use.

Background technique

A kind of motor compressor for example is equipped with motor and scroll compression body in its housing, make refrigerant gas enter exhaust chamber by the exhaust port that is positioned on the scroll compression body fixed scroll.Exhaust chamber in the housing can adopt multiple conventional structure.

Accompanying drawing 5 discloses a kind of scroll compressor, the spy who is recorded in without examination as to substances opens in the Japanese patent of invention document of clear 62-142801, and its exhaust chamber has certain interval by the annular periphery wall around the ear end face of fixed scroll, the fixed scroll and with the ear end face of fixed scroll and forms jointly by the fixing flat board of bolt and periphery wall.

Accompanying drawing 1,5 also discloses a kind of scroll compressor, be recorded in without the reality of examination as to substances and open in the Japanese Utility Model patent documentation of flat 1-144484, its exhaust chamber is formed by the periphery wall of fixed scroll and the tubular lid that opens wide along the fixing end of the groove of periphery wall far-end.In addition, as shown in Figure 3 be recorded in a kind of scroll compressor in the Japanese patent of invention document that spy without examination as to substances opens flat 5-256272, its exhaust chamber is to be formed by the periphery wall of fixed scroll and the tubular that far-end fixes and an end the opens wide lid by bolt and periphery wall.

Use the compressor of carbon dioxide as refrigerant gas, the maximum pressure of compressor is approximately and uses fluorocarbon ten times as the compressor maximum pressure of refrigerant gas.Based on this kind reason, the outermost of scroll compression body compression chamber and the pressure difference of exhaust cavity can produce an annular portion, that is: the ear end face of fixed scroll does not comprise that the part at center is out of shape to movable scroll side.Under the situation of fixed scroll distortion, arbitrary vortex wall of scroll all needs a bigger gap at each other far-end, has so just reduced the compression efficiency of compressing mechanism.In addition, because the distortion of fixed scroll, cause the far-end of arbitrary vortex wall of scroll to be subjected to the opposite pressure of direction with the distortion of fixed scroll, each vortex wall all needs to gain in strength.

For avoiding the distortion of fixed scroll, exhaust cavity can reduce volume, and only the core with fixed scroll is relative to make it.Correspondingly, the pressure of refrigerant gas no longer puts on the outer circumferential side that fixed scroll is positioned at compression chamber, thereby has avoided the distortion of fixed scroll.But because the volume of exhaust cavity reduces, refrigerant gas has just increased from the pulsation of scroll compression body row when the exhaust cavity.In addition, when using carbon dioxide as refrigerant gas, the maximum pressure of refrigerant gas is high, causes refrigerant gas to produce significantly pulsation.

Only the core with fixed scroll is relative when exhaust cavity, and when keeping discharge chamber volume, exhaust cavity need be along the axially-extending of fixed scroll, and perhaps exhaust cavity is increased in away from the radial cross section of fixed scroll direction long-pending when the radial cross section that reduces to join with fixed scroll is long-pending.So, housing will increase, and compressor increases accordingly.

Not only there is this problem in scroll compressor, and also there is this problem in piston compressor.Pressure difference mentioned above, the valve plate distortion that causes separating compression chamber and exhaust cavity.When thickening valve plate avoiding distortion, and exhaust cavity be will keep certain volume the time, and the housing of compressor will increase, and perhaps compressor weight increases.Therefore, the needs that solve following technical problem have just been produced: under the prerequisite that does not increase compressor housing, avoid the distortion of the compressing mechanism that higher pressure refrigerant gas causes, increase the volume of exhaust cavity simultaneously.

Summary of the invention

According to compressor of the present invention, it comprises: housing, compressing mechanism and divider.In housing, limit an exhaust cavity.Compressing mechanism is adjacent with exhaust cavity in housing.Divider is in the face of a presumptive area, so that the pressure of the refrigerant gas in the restriction exhaust cavity puts on presumptive area, this presumptive area is meant the part in the zone except the location of gas discharge hole opening of facing exhaust cavity of compressing mechanism.

Other feature and advantage of the present invention, by consulting the following description of accompanying drawing, and by the explanation of embodiment to basic principle of the present invention, it is clear to become.

Description of drawings

Feature of the present invention is novel, is embodied in especially in every claim.By to following preferred embodiment and the description of the drawings, can objects and advantages of the present invention be understood fully.Wherein:

Fig. 1 is the axial, cross-sectional view according to the motor compressor of first preferred embodiment of the invention.

Fig. 2 is the partial section according to the motor compressor of first preferred embodiment of the invention.

Fig. 3 is the perspective view of partition member.

Fig. 4 is the axial, cross-sectional view according to the motor compressor of second preferred embodiment of the invention.

Fig. 5 is the partial section according to the motor compressor of second preferred embodiment of the invention.

Fig. 6 is the perspective view according to the exhaust casing of second preferred embodiment of the invention.

Fig. 7 be according to second preferred embodiment of the invention connecting tube the position axial, cross-sectional view.

Fig. 8 is the axial, cross-sectional view of the compressor of alternate embodiments according to the present invention.

Embodiment

1-3 in conjunction with the accompanying drawings describes first preferred embodiment that is used for the vortex motor compressor 10 of vehicle air conditioner according to the present invention now.

As shown in Figure 1, motor compressor 10 comprises housing 11, and housing 11 is to be formed by first housing structure 12 and second housing structure 13, and first housing structure 12 links to each other with second housing structure 13, and forms by aluminium alloy compression casting.First housing structure 12 is for dark cylindrical shape and have opening at one end, and comprise larger-diameter cylindrical portion 14, than the cylindrical portion 15 and the tube end 16 of minor diameter.Be connected to become a whole than the cylindrical portion 15 of minor diameter and an end of larger-diameter cylindrical portion 14.One end of the cylindrical portion 15 of the tube end 16 sealing minor diameters.Second housing structure 13 is for shallow cylindrical shape and have opening at one end, and comprises the cylindrical portion 17 and the tube end 18.Cylindrical portion 17 is basic identical with the diameter of larger-diameter cylindrical portion 14.One end of the tube ends 18 closed tube shape part 17.

In first housing structure 12, be positioned at than cylindrical portion 15 1 sides of minor diameter than the cylindrical portion 14a of minor diameter and be positioned at the larger-diameter cylindrical portion 14b of first housing structure 12 openings, one side and be formed on larger-diameter cylindrical portion 14 inboards, between has formed a step, and step surface is the first supporting surface 14c.On the other hand, in the inboard of second housing structure 13, on respect to the radially inner side of the inboard of the inner peripheral surface 17a of cylindrical portion 17 and on respect to the radially inner side of the first supporting surface 14c, form the second supporting surface 17b.

Be formed with a plurality of mating parts 19 in first housing structure 12, be distributed in the outer circumferential side of larger-diameter cylindrical portion 14 open parts at certain intervals.Second housing structure 13 with mating part 19 corresponding positions, also has a plurality of mating parts 20 at the outer circumferential side of cylindrical portion 17 open parts.As shown in Figure 2, first housing structure 12 and second housing structure 13 tighten up by bolt 21 at each mating part 19,20.In addition, the conjunction plane 12a of first housing structure 12 is relative with the conjunction plane 13a of second housing structure 13, and compresses mutually by the liner 22 of annular, thereby forms a confined space 23 in housing 11.

The inner peripheral surface of the conjunction plane 13a of second housing structure 13 is with respect to the radially extension of the inner peripheral surface of first housing structure, 12 conjunction plane 13a.The inner peripheral surface of conjunction plane 13a is relative with the first supporting surface 14c of first housing structure 12.And the conjunction plane 13a of the liner 22 and second housing structure 13 has same shape.The inner peripheral surface of the liner 22 also first supporting surface 14c with first housing structure 12 is relative.

As shown in Figure 1, in first housing structure 12, have the axle support section 24 of a tubular, be positioned at the tube inboard central position, the ends 16 of first housing structure 12.On the other hand, first housing structure 12 also has an axle supporting member 25, is installed on the larger-diameter cylindrical portion 14b of larger-diameter cylindrical portion 14 of first housing structure 12.Axle supporting member 25 comprises cylindrical portion 26 and flange 27.Cylindrical portion 26 has a through hole 26a.Flange 27 is positioned at an end of cylindrical portion 26.Because axle supporting member 25 is positioned first housing structure 12, so the periphery of flange 27 contacts with the first supporting surface 14c.

Have axle 28, one ends rotatably to be supported in axle support section 24 by bearing 29 in first housing structure 12, the other end also rotatably is supported in the through hole 26a of a supporting member 25 by bearing 30.Axle supporting member 25 and tube form motor cavity 31 at the end 16.Be surrounded with the stator 33 of field coil 32, be installed in the cylindrical portion 15 of first housing structure 12 than minor diameter.The rotor 34 of many magnetic poles is fixed in axle 28, and relative with stator 33.Field coil 32, stator 33, rotor 34, and other annex forms inner-rotor type electronics brushless electric machine jointly.

In the larger-diameter cylindrical portion 14 of first housing structure 12 Scrawl compressor structure 35 is installed.Fixed scroll 36 is positioned on the larger-diameter cylindrical portion 14b of first housing structure 12.Fixed scroll 36 has plate-like base plate 37, tubular periphery wall 38 and fixed scroll wall 39.Tubular periphery wall 38 forms an integral body with the outer circumferential face of base plate 37.Fixed scroll wall 39 integral body are positioned at the inboard of the periphery wall 38 of base plate 37.The far-end of fixed scroll 36 periphery walls 38 is with contacting with the contacted flange 27 of the first supporting surface 14c of axle supporting member 25.

In a side of fixed scroll 36, bent axle 40 extends from the end face of axle 28.The axle bush 41 that has a counterweight 41a be fixed in bent axle 40 around.Movable scroll 42 and fixed scroll 36 can be relative rotation, and be supported in axle bush 41 by bearing 43, bearing 43 and axle bush 41 all are arranged in axle sleeve 42a.Bent axle 40, axle bush 41 and the bearing 43 common cover rotating machinerys that form by the rotation of axle 28, drive movable scroll 42 rotations.

Movable scroll 42 has plate-like base plate 44 and movable vortex wall 45, and movable vortex wall 45 integral body are formed at base plate 44.As shown in Figure 2, the movable vortex wall 45 of movable scroll 42 is meshed with the fixed scroll wall 39 of fixed scroll 36.The far-end of movable vortex wall 45 contacts with the base plate 37 of fixed scroll 36 by the Sealing (not shown).Equally, the far-end of fixed scroll wall 39 contacts by the base plate 44 of Sealing (not shown) with movable scroll 42.Therefore, fixed scroll 36 forms a compression chamber 47 with movable scroll 42, and compression chamber 47 is adjacent with the center portion of the base plate 37 of fixed scroll 36.

Compression chamber 47 is connected by an exhaust port 37a with the inner space of second housing structure 13, and exhaust port 37a runs through the center of the base plate 37 of fixed scroll 36, and perforate is in the ear end face 37b of base plate 37.Form air aspiration cavity 48 between the most peripheral part of the movable vortex wall 45 of the periphery wall 38 of fixed scroll 36 and movable scroll 42.Air aspiration cavity 48 is connected with motor cavity 31 by a passage (not shown), and link to each other with the vaporizer of external refrigeration loop (not shown) by suction port 49 (referring to accompanying drawing 1), the suction port 49 that is formed at first housing structure 12 makes motor cavity 31 be connected with the outside.

A plurality of fixing pins 50 are installed on the circumferentia of base plate 37 of fixed scroll 36; And corresponding with a plurality of fixing pin 50 difference, a plurality of loose pins 51 are installed on the base plate 44 of movable scroll 42.Fixing pin 50 and the loose pin 51 common anti-rotation mechanisms that form movable scroll 42.

There is outlet valve 52 at the center of the ear end face 37b of the base plate 37 of fixed scroll 36, is used for opening and closing exhaust port 37a.The retainer 53 that is fixed in base plate 37 can be adjusted the opening degree of outlet valve 52.

The inner peripheral surface of the conjunction plane 13a of the inner peripheral surface of liner 22 and second housing structure 13 contacts with the outer circumferential face of the ear end face 37b of the base plate 37 of fixed scroll 36 successively.Fixed scroll 36, axle supporting member 25 and liner 22 remain between the second supporting surface 17b of the first supporting surface 14c of first housing structure 12 and second housing structure 13.Fixed scroll 36 remains between liner 22 and the axle supporting member 25.

Annular and separation spare 60 is arranged in second housing structure 13.Divider 60 remains between the fixed scroll 36 and second housing structure 13.As shown in Figure 3, divider 60 has a plate-like partition wall 61 and a cylindrical periphery-wall 62.Cylindrical periphery-wall 62 partition wall 61 axially on begin to extend from the outer circumferential face of partition wall 61.As shown in Figure 2: the turning between partition wall 61 and the perisporium 62 joins with circular-arc.Therefore, partition wall 61 has increased the intensity of the axial counter-bending distortion of perisporium 62.Point out at this: divider 60 is to be made by the wrought iron material monolithic.

As shown in Figure 3, outer surface and opposition side close and partition wall 61 at perisporium 62 are provided with a groove 63 recessedly.In Fig. 3, the rubber layer 64 that the heat insulating elastic material is made is positioned on the outer surface of the perisporium 62 to groove 63 left sides from partition wall 61.In addition, along the interior week of partition wall 61, and with perisporium 62 opposite sides on be positioned at and be provided with an annular groove 65 on the partition wall 61 recessedly.As depicted in figs. 1 and 2,

O type ring

66,67 is installed on respectively among the groove 63,65.In first preferred embodiment, rubber layer 64 and O type ring 67 adopt the heat insulating elastic material.O type ring 66 is first Sealing, and O type ring 67 is second Sealing, forms Sealing thus.

The perisporium 62 of divider 60 is supported in by rubber layer 64 on the inner peripheral surface 17a of cylindrical portion 17 of second housing structure 13.In addition, the far-end of perisporium 62 contacts with the second supporting surface 17b of second housing structure 13.Partition wall 61 is in the face of the annular region (presumptive area) of the ear end face 37b of the base plate 37 of fixed scroll 36 (i.e. the part of facing mutually with the exhaust cavity of compressing mechanism), but do not comprise the core (being the zone of vent openings) of ear end face 37b of the base plate 37 of fixed scroll 36.Simultaneously, O type ring 66 closely contacts with the inner peripheral surface 17a of second housing structure 13, and O type ring 67 closely contacts with the ear end face 37b of the base plate 37 of fixed scroll 36.That is, divider 60, axle supporting member 25 and fixed scroll 36 remain between first housing structure 12 and second housing structure 13.Thereby, divider 60 be positioned at axle 28 axially on.

At second housing structure, the 13 inner exhaust cavitys that limit, compression chamber 47 is connected with exhaust cavity 68 by the exhaust port 37a on the fixed scroll 36.Exhaust cavity 68 is by divider 60,

O type ring

66 and 67 and the airtight isolation of annular region, and this annular region is meant that the ear end face 37b of the base plate 37 of fixed scroll 36 does not comprise the zone of core.In other words: the space between the partition wall 61 of this annular region and divider 60 is that annular region is meant the zone except core of the ear end face 37b of base plate 37 by liner 22,

O type ring

66 and 67 and the space of exhaust cavity 68 airtight isolation.Air aspiration cavity 48 is by a through hole 37c and above-mentioned spatial communication, and through hole 37c is positioned on the base plate 37 of fixed scroll 36.On the other hand, exhaust cavity 68 is communicated with by exhaust port 69 with the condenser of external refrigeration cycle (not shown), and exhaust port 69 is positioned on second housing structure 13.

In above-mentioned motor compressor, during motor driving, movable scroll 42 centers on the axis rotation of fixed scroll 36 by the bent axle 40 of axle 28.Because rotatablely moving of movable scroll 42, when the volume of compression chamber 47 continued to dwindle, compression chamber 47 inwardly moved from the outer circumferential side of fixed scroll wall 39, movable vortex wall 45, and therefore, refrigerant gas is inhaled into compression chamber 47 by air aspiration cavity 48 and compresses.After refrigerant gas is compressed, enter exhaust cavity 68, and import the condenser of external refrigeration cycle by exhaust port 69 by the exhaust port 37a on the scroll 36.

According to a first advantageous embodiment of the invention, can obtain following beneficial effect.

(1) in the housing 11 divider 60 is installed, in housing, scroll compression body 35 and exhaust cavity 68 is adjacent with the ear end face 37b of fixed scroll 36, and divider 60 is relative with annular region, and annular region is meant the zone that does not comprise core of ear end face 37b of the base plate 37 of fixed scroll 36.Divider 60 avoids the pressure of the refrigerant gas in the exhaust cavity 68 to put on annular region.

Therefore, even in exhaust cavity 68 under the high pressure effect of refrigerant gas, the base plate 37 of fixed scroll 36 also can be towards the direction distortion of movable scroll 42.Accordingly, the gap between the base plate 44 of the fixed scroll wall 39 of fixed scroll 36 and movable scroll 42 changes, and the variation of the gap between the base plate 37 of the far-end of the movable vortex wall 45 of movable scroll 42 and fixed scroll 36, all can diminish.Because the far-end of fixed scroll wall 39 (or movable vortex wall 45) is not pressed against on the base plate 44 (or base plate 37) with compressing, so the proximal part of

vortex wall

39,45 too high stress can not occur, has so just improved reliability.

In addition, iron divider 60 has higher intensity than aluminum alloy divider, this iron divider 60 is positioned at the opening end of cylindrical shape second housing structure 13 of aluminum alloy system, this second housing structure has the bottom at one end, divider 60 avoids the pressure of the refrigerant gas in the exhaust cavity 68 to put on annular region, and annular region is meant that the ear end face 37b of the base plate 37 of fixed scroll 36 does not comprise the zone of core.Accordingly, inequality and thinner when the thickness ratio spacing body 60 of divider 60 and second housing structure, 13 whole formation, so the capacity limitation of exhaust cavity 68 has just been reduced.

As a result of, compressing mechanism 35 just avoids because the distortion that causes of higher pressure refrigerant gas, and under the situation that does not increase housing 11, the volume of exhaust cavity 68 can increase.

Iron divider 60 has lower permeability to heat than aluminum alloy divider, and between the base plate 37 of divider 60 and fixed scroll 36 air layer is arranged, this air layer has reduced the transmission of heat of refrigerant gas by the refrigerant gas of fixed scroll 36 in air aspiration cavity 48 in the exhaust cavity 68.So the refrigerant gas in the air aspiration cavity 48 has been avoided the decline of density, the compression efficiency of compressing mechanism 35 is improved.

(2) divider 60 by plate-like partition wall 61, be positioned at partition wall 61 outer circumferential face along its axial cylindrical periphery-wall 62 whole formation.Partition wall 61 is relative with annular region, and annular region is meant that the ear end face 37b of the base plate 37 of fixed scroll 36 does not comprise the zone of core.Perisporium 62 inserts and is supported on the inner peripheral surface 17a of second housing structure 13.

Because divider 60 is positioned at housing 11, therefore can adopt conventional housing.In addition, insert and be supported in housing 11, so the outer circumferential face of the axial resistance to deformation strength ratio divider of partition wall 61 only is improved with the situation that plate-like is propped up when being held in housing 11 from the axially extended cylindrical periphery-wall of the outer circumferential face of partition wall 61 62.Like this, can avoid the further distortion of the base plate 37 of fixed scroll 36 effectively.

(3) owing to use rubber layer 64 as the perisporium 62 of divider 60 and the thermal-protective material between second housing structure 13, reduced the heat delivered of the refrigerant gas of refrigerant gas in the air aspiration cavity 48 from exhaust cavity 68, reduced from exhaust cavity 68 by divider 60 to motor cavity 31 and from the heat delivered of exhaust cavity 68 to second housing structures 13, first housing structure 12.Therefore, avoided the decline of the refrigerant gas density in the air aspiration cavity 48, the compression efficiency of compressing mechanism 35 is improved.

In addition,, reduced from divider 60 to fixed scroll by 36 heat delivered, so just further improved the compression efficiency of compressing mechanism 35 because O type ring 67 embeds between the base plate 37 of dividers 60 and fixed scroll 36.

(4) divider 60 by rubber layer 64 elastic support in housing 11, and between the perisporium 62 and second housing structure 13 of divider 60.Therefore, refrigerant gas is expelled to noise and the vibration that the pulsation of exhaust cavity 68 causes from compression chamber 47 and can reduces.

4-7 in conjunction with the accompanying drawings describes second preferred embodiment of vortex motor compressor 10 of the present invention, and second preferred embodiment and first preferred embodiment of the present invention are similar.Same reference character represent with first preferred embodiment in identical parts, specify and omitted.Only those parts that are different from first preferred embodiment are described.

The 3rd supporting surface 17c has replaced the second supporting surface 17b in first preferred embodiment, is positioned at according on second housing structure 13 of second preferred embodiment.The 3rd supporting surface 17c is near the opening end of cylindrical portion 17, and is relative with the first supporting surface 14c of first housing structure 12.

What be different from first preferred embodiment is that second housing structure, 13 conjunction plane 13a radially do not extend with respect to first housing structure, 12 conjunction plane 12a.Yet the inner peripheral surface of liner 22 extends radially inwardly with respect to conjunction plane 12a, 13a.Therefore, the inner peripheral surface of liner 22 contacts with the outer circumferential face of the ear end face 37b of the base plate 37 of fixed scroll 36.

The exhaust casing 80 that forms exhaust cavity 68 is arranged in second housing structure 13.Shown in Fig. 5,6, exhaust casing 80 comprise an annular and separation spare 81 and an end closure in divider 81, be roughly semicircular cover 82 (promptly forming one of parts of exhaust cavity 68).Divider 81 is supported in housing 11, thereby relative with annular region, and annular region is meant that the ear end face 37b of the base plate 37 of fixed scroll 36 does not comprise the zone of core.Divider 81 is to be made by the wrought iron material monolithic.And cover 82 is stamped to form by iron plate.Divider 81 welds together with cover 82.Welding can be adopted oxyacetylene welding, metal active gas arc-welding (MAG weldering), laser beam welding and pressure welding.Pressure welding can be adopted resistance welding or friction welding.

Divider 81 comprises the flange 83 near fixed scroll 36, and flange 83 extends laterally.Divider 81 at its outer surface 81a, comprise and the surface of flange 83 be coated with rubber layer 84 that what rubber layer 84 adopted is to have heat insulation and material shock-absorbing function.

Divider 81 comprises plate-like partition wall 85 and extends the periphery of partition wall 85, is positioned at the axial cylindrical periphery-wall 86 of partition wall 85.The interior perimeter surface at the turning between partition wall 85 and the perisporium 86 forms circular arc type, so just increased partition wall 85 at the axial flexural strength of perisporium 86.Divider 81 is to be made by the wrought iron material monolithic.

Annular groove 87 centers on the opening 85a of partition wall 85, and is positioned on the end face of partition wall 85, and is opposite with perisporium 86 directions of the partition wall 85 that is positioned at divider 81.Annular groove 88 is along the week of the partition wall 85 of the end face that is positioned at partition wall 85, and is opposite with perisporium 86 directions.O type ring 89 is installed in the annular groove 88.In second preferred embodiment, O type ring 89 plays sealing function as a Sealing.

The perisporium 86 of exhaust casing 80 inserts and is supported in by rubber layer 84 on the interior perimeter surface 17a of cylindrical portion 17 of second housing structure 13.The flange 83 of divider 81 contacts with the 3rd supporting surface 17c by rubber layer 84.Partition wall 85 is relative with annular region (presumptive area), and this annular region is meant that the ear end face 37b of the base plate 37 of fixed scroll 36 does not comprise the zone (part) of center (location).Meanwhile, O type ring 89 closely contacts with the ear end face 37b of the base plate 37 of fixed scroll 36.In addition, the interior week of liner 22 is between the periphery of the ear end face 37b of the flange 83 of divider 81 and scroll 36 base plates 37.Like this, exhaust casing 80, axle supporting member 25, fixed scroll 36 remain between the 3rd supporting surface 17c of the first supporting surface 14c of first housing structure 12 and second housing structure 13.Therefore, exhaust casing 80 is positioned on the axis of running shaft 28.

The exhaust cavity 68 that exhaust casing 80 limits, by the cover 82 that is connected with divider 81 that the exhaust cavity 68 and second housing structure 13 is isolated.Therefore, exhaust cavity 68 is separated with annular region by divider 81 and O type ring 89 under airtight conditions, and annular region is meant that the ear end face 37b of the base plate 37 of fixed scroll 36 does not comprise the zone at center.That is: the space between the partition wall 85 of annular region and divider 81 isolates under airtight conditions with exhaust cavity 68 by liner 22 and O type ring 89, and annular region is meant that the ear end face 37b of the base plate 37 of fixed scroll 36 does not comprise the zone at center.This space is connected with air aspiration cavity 48 by through hole 37c, and through hole 37c is positioned on the base plate 37 of fixed scroll 36.

Shown in Figure 4 and 5, between the internal surface of the bottom 18 of the outer surface of cover 82 and second housing structure 13, there are a gap or other to have the hot isolating part 90 of close spatial form.Gap 90 is used to isolate control transfer of heat at second housing structure 13 and between cover 82.

As shown in Figure 5, the perisporium 86 of the divider 81 of exhaust casing 80 has supporting base 91 in, is positioned on the peripheral direction of perisporium 86.One intercommunicating pore 92 is arranged in the interior supporting base 91, be communicated with exhaust cavity 68 with outside.Mounting hole 93 in one is arranged in the interior supporting base 91, connect hole 92 and be opened on the outer surface of divider 81.On the other hand, second housing structure 13 has an outer supporting base 94, be positioned at and supporting base 91 corresponding positions, and outer supporting base 94 has an outer mounting hole 95 to be consistent with interior mounting hole 93.

As shown in Figure 7, among the interior mounting hole 93 and outer supporting base 94 outer mounting holes 95 of supporting base 91, form the passage of the intercommunicating pore 92 of supporting base 91 in being communicated with in inserting connecting tube 96.The interior connecting tube 96a of connecting tube 96 is by O type ring 97a, 97b, and the airtight isolation in interface between second housing structure 13 and the exhaust casing 80, O type ring 97a, 97b embed respectively between the interior perimeter surface of interior perimeter surface, connecting tube 96 and outer mounting hole 95 of connecting tube 96 and interior mounting hole 93, and connecting tube 96 is connected with the intercommunicating pore 92 of interior supporting base 91.In addition, not shown with external refrigeration cycle) condenser be connected (pipe joint 98 is connected with the outer mounting hole 95 of outer supporting base 94.In second preferred embodiment, think that the function of connecting tube 96 and O type ring 97a, 97b belongs to communication means.

Above-mentioned motor compressor 10, refrigerant gas is discharged from compression chamber 47, drain into exhaust cavity 68 in the exhaust casing 80 by exhaust port 37a, by the intercommunicating pore 92 of interior supporting base 91 and the interior connecting tube 96a of connecting tube 96, be delivered to the condenser of external refrigeration cycle by exhaust cavity 68.

According to second preferred embodiment, except can obtaining the described advantage of preamble (1)-(4) section, also has following advantage.

(5) corresponding to the divider in first preferred embodiment 60, divider 81 comprises the cover 82 isolated with the exhaust cavity 68 of second housing structure, 13 inboards.By being discharged to housing 11 outsides connecting tube 96, the interface surface between connecting tube 96 and exhaust casing 80 and second housing structure 13 seals refrigerant gas from exhaust cavity 68.Gap 90 have and second housing structure 13 and cover 82 between spatial class like shape, and the space that isolates as a heat.Therefore, the heat that conducts to the refrigerant gas in air aspiration cavity 48, the motor cavity 31 by second housing structure 13, the refrigerant gas of first housing structure 12 from exhaust cavity 68 has just reduced.Accordingly, the refrigerant gas in the air aspiration cavity 48 has been avoided the decline of density, thereby the compression efficiency of compressing mechanism 35 is improved.

Moreover cover 82 made of iron has higher intensity than aluminum alloy cover, and directly the structure of portion's shape exhaust cavity 68 is thin within it than second housing structure 13 in first preferred embodiment for the thickness of second housing structure 13.Therefore, have at housing 11 under the situation of reduced size, exhaust cavity 68 can obtain same volume.In addition, cover 82 made of iron has lower permeability to heat than aluminum alloy cover, has reduced the heat that conducts to second housing structure 13 by the refrigerant gas of cover 82 from exhaust cavity 68.

The present invention is not limited to the above embodiments, but can be revised as following selectable mode of execution.

A selectable mode of execution of first preferred embodiment is that divider 60 is made by other metallic material, for example: magnesium alloy, titanium alloy.In addition, divider 60 can be made by nonmetallic material.This point also is applicable to the divider 81 and the cover 82 of the exhaust casing 80 in second preferred embodiment.

A selectable mode of execution of second preferred embodiment is with rubber layer or a kind of heat insulating member, to fill the gap of tube at the end 18 of the cover 82 and second housing structure 13 of exhaust casing 80.When assemble compressible machine 10, rubber layer injects the gap of the exhaust casing 80 and second housing structure 13 with fluid state, or is coated on the outer surface of cover 82 of exhaust casing 80 in advance or is coated in advance on the inner surface at the tube end 18 of second housing structure 13.

A selectable mode of execution of first preferred embodiment is, housing 11 comprises: accommodate first housing structure and second housing structure of motor, second housing structure comprises: the axle supporting member, compressing mechanism, divider 81 and the exhaust cavity 68 that are used for an end face of back shaft.This point also can be applicable to second preferred embodiment.

A selectable mode of execution of first preferred embodiment is, divider is one and does not comprise the regional relative of center with the ear end face of fixed scroll, and is supported in the plate-like partition wall between first housing structure 12 and second housing structure 13.

The present invention can be used for the motor compressor of fluorocarbon refrigerants as refrigerant gas.

As shown in Figure 8, the present invention can be used for adopting the compressor of piston-type compressor structure.This compressor has the axle 100 that is driven by external impetus, and a plurality of pistons 102 are reciprocating in cylinder barrel 103 separately by swash plate 101.Each piston 102 forms a compression chamber 105 with valve port assembly 104 in cylinder barrel 103, refrigerant gas is compressed.Valve port assembly 104 is formed by the outlet valve 109 of Aspirating valves 107, exhaust port 108 and the plate valve formula of suction port 106, plate valve formula.Rear case 110 is connected with valve port assembly 104, forms air aspiration cavity 111 and exhaust cavity 112., air aspiration cavity 111 all can be communicated with each Aspirating valves, and exhaust cavity 112 all can be communicated with each outlet valve.Exhaust cavity 112 is positioned at a side of axle 100, and relative with each compression chamber 105, and air aspiration cavity 111 circular array are in the outer circumferential side of exhaust cavity 112.

In having the compressor of this compressing mechanism, divider 113 is arranged in the face of an annular region (presumptive area), this annular region be valve port assembly 104 in the face of the part of exhaust cavity 112 (promptly in compressing mechanism relative part), i.e. zone except the center of outlet valve place (special position of vent openings) with exhaust cavity.The divider 113 of tubular inserts and props up and is held on the exhaust cavity 112.On the other hand, between divider 113 and valve port assembly 104, be not used for the annular region of separating valve mouth assembly 104 and the airtight space between the divider 113, with the Sealing of exhaust cavity 112.Yet because the gap between valve port assembly 104 and the divider 113 is enough little, therefore, the pressure of the refrigerant gas in the exhaust cavity 112 is restricted, and only puts on the annular region of valve port assembly 104.

In this case, because divider 113 has been controlled the pressure that refrigerant gas in the exhaust cavity 112 puts on the annular region of valve port assembly 104, in fact valve port assembly 104 can not be out of shape towards compression chamber 105 directions.Therefore, just avoided because the distortion of valve port assembly 104, be communicated with between the exhaust cavity 112 that causes and the air aspiration cavity 111, the refrigerant gas in the exhaust cavity 112 has also just been avoided to the leakage of air aspiration cavity 111, thereby avoided the decline of compressing mechanism compression efficiency.

Application of the present invention is not limited to the motor compressor that motorcar air conditioner uses, but can be applicable to the motor compressor such as the domestic air conditioner use.

Application of the present invention is not limited to the motor compressor that air conditioner uses, but can be applicable in air conditioner refrigeration cycle other refrigeration cycle in addition, that is: the motor compressor of the refrigeration cycle of refrigerator or refrigerator use.

The motor compressor that application of the present invention is not limited to use in the refrigeration cycle, but can be applicable to electric air compressor such as the vehicle air suspension system.

Application of the present invention is not limited to motor compressor, but can be applicable to such as: by vehicle internal combustion engine or the oil-engine driven Scrawl compressor of gas heat pump.

Therefore, exemplifying or embodiment above, should think illustrative but not determinate, the details that the present invention is not limited to above provide, but can within the scope of appended claim, change.

Claims

1, a kind of compressor, it comprises:

Housing limits exhaust cavity in this housing;

The compressing mechanism adjacent in this housing with this exhaust cavity; And

Divider, this divider is in the face of a presumptive area, put on this presumptive area so that limit the pressure of the refrigerant gas in this exhaust cavity, this presumptive area is meant the part in the zone except the location of gas discharge hole opening of facing exhaust cavity of this compressing mechanism.

2, compressor as claimed in claim 1 is characterized in that: this divider is to be made by the material different with the material of making housing.

3, compressor as claimed in claim 2 is characterized in that: this divider is a metallic material, contacts with housing or compressing mechanism by thermal-protective material.

4, compressor as claimed in claim 3 is characterized in that: this divider is fabricated from iron.

5, compressor as claimed in claim 3 is characterized in that: this divider is to be made by the material higher than the intensity of case material.

6, compressor as claimed in claim 1, it is characterized in that: this divider is integrally formed by plate-like partition wall and cylindrical periphery-wall, this plate-like partition wall is relative with this presumptive area, this cylindrical periphery-wall extends along the axial outer circumferential face from partition wall of partition wall, and inserts and be supported in the housing.

7, compressor as claimed in claim 6 is characterized in that, also comprises: be arranged on the Sealing that is used in the space between presumptive area and the divider with the airtight isolation of exhaust cavity.

8, compressor as claimed in claim 7 is characterized in that: the sealing part comprises: first Sealing and second Sealing, first Sealing are arranged between this perisporium and the housing, and second Sealing is arranged between partition wall and the compressing mechanism.

9, compressor as claimed in claim 6 is characterized in that: this perisporium is supported on the inner peripheral surface of housing by thermal-protective material.

10, compressor as claimed in claim 9 is characterized in that: this thermal-protective material is the elastic material that can absorb vibration.

11, compressor as claimed in claim 6 is characterized in that, also comprises: the separator that is connected with the divider that forms exhaust cavity, so that isolate the exhaust cavity of this housing inboard; And

Communication apparatus, it is used to make exhaust cavity to be connected airtightly with the outside of housing.

12, compressor as claimed in claim 11 is characterized in that, also comprises: be used to avoid heat from the heat-proof device of divider to the compressing mechanism transmission.

13, compressor as claimed in claim 11 is characterized in that, also comprises: be used to avoid heat from the heat-proof device of separator to the housing transmission.

14, compressor as claimed in claim 13 is characterized in that: this heat-proof device is the gap between separator and the housing.

15, compressor as claimed in claim 6 is characterized in that: this housing comprises first housing structure and second housing structure, in first housing structure compressing mechanism is arranged, and second housing structure limits exhaust cavity therein.

16, compressor as claimed in claim 15 is characterized in that: this divider remains between first housing structure and second housing structure.

17, compressor as claimed in claim 6, it is characterized in that: this compressing mechanism is an eddy type, and comprise: fixed scroll and movable scroll, this part is the fixed scroll ear end face, this location is the center of the ear end face of fixed scroll, this presumptive area is an annular region, i.e. the zone of the ear end face of fixed scroll except its center.

18, compressor as claimed in claim 17 is characterized in that: this housing also limits air aspiration cavity, and annular region is connected with this air aspiration cavity with space between the divider.

19, compressor as claimed in claim 1, it is characterized in that: carbon dioxide is as refrigerant gas.

20, compressor as claimed in claim 1, it is characterized in that: this compressing mechanism is a piston type, and comprise the valve port assembly, this part is the ear end face of valve port assembly, this location is the center of ear end face, this presumptive area is an annular region, i.e. the zone except its center of ear end face.